Materials Literature
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Platinum catalysts of H2 activation with average size ≤2.0 nm were prepared in a base of reduction conversion of graphene oxide. A low few-layered carbon nanomaterial was prepared by thermoexpansion and annealing of graphene oxide. The uniformly dispersed Pt nanoparticles were supported on two-dimension graphene flat…
The effect of irradiation with ions Ar+ (energy of 1 MeV and 1.8 MeV) and He+ (energy of 0.6 MeV) on the structure and mechanical properties of the vacuum-arc nitride coatings. It is shown that the level of exposure to radiation materials can be divided into 3 classes: a) “the most persistent” - significant changes oc…
The prepared polyelectrolyte complexes of anionic copolymer of divinyl ester and maleic anhydride and cationic water soluble chitosan proved to be able to undergo reversible phase transition, in particular at physiological pH and ionic strength. Formation of either soluble or insoluble complexes occurred depending on…
Analytical disciplines are an important field for the progress of healthcare and medicine. In fact the technologies related to analytical disciplines may reveal important information for early diagnosis, treatment of diseases, food safety and environmental monitoring. In this regard, novel advances in analytical disci…
A nanocomposite was synthesized using silica nanoparticles (SN) and Epoxy Vinyl Ester Resin (VE671). Nanoparticles were dispersed in the mixture by ultrasonic equipment to prevent the agglomera-tion. Transmission electron microscopy (TEM) was used to investigate the dispersion of the silica nanopar-ticles in the mixtu…
The paper presents results of a study of the band structure and related parameters and also the bond energy of single-walled carbon nanotubes carried out using semiempirical methods and ab initio density functional theory implemented in Gaussian 2003 framework. Much attention is paid to the dependency of the values me…
The paper describes the influence of the imposition of static magnetic field on brushite crystallization. Two different configurations of the magnetic field were used. The flasks with the precipitates were placed near the different poles. It was shown that changing the magnetic field configuration and positioning the…
The changes in the local structure of the fullerenes C60 are studied after high-temperature annealing. Based on the model of atomic configurations obtained by reverse Monte Carlo, the quantitative character-istics of the topological order are founded for the C60 in initial state and after annealing. It is shown that t…
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The congestion of the radio frequency bands imposes serious limitations on\nthe capacity and capability of modern wireless information infrastructures. One\napproach to enable frequency re-use is to exploit other physical conserved\nquantities of the electromagnetic fields, such as the orbital angular momentum\n(OAM)…
Electron holography provides information on the phase and amplitude of electron wave passing through a specimen. The recently proposed stage-scanning electron holography technique should improve the spatial resolution of phase and amplitude images compared to the conventional electron holography based on the Fourier t…
Electronic properties and stability of AA-stacking bigraphene with holes are calculated using molecular mechanic and DFT methods. A scheme for producing quantum dots based on bigraphene is proposed. Calculations have shown that the presence of holes with the zig-zag edges can lead to the formation of bilayer graphene…
The Cd1-xZnxS(x = 0.0,0.2,0.4,0.6,0.8,1.0) thin films were deposited using the Chemical Bath Deposition Method (CBD). The prepared Cd1-xZnxS thin films were optically characterized. The effect of Zn content on absorption and transmission spectra was investigated. The significant blue shift of absorption edge as well a…
AbctactMdels proposed up to now to describe ductile fracture nucleation ahead of sharp cracks are reviewed and mathematical relationships, derived for qlculalng fnc.ture toughness, discussed.A new model, based on the phenomenon of crack tip blunting, has been conceived.Equations relating Jg or l(" to inclusion spacing…
The energy absorbing capability is one of the most important aspects of crushing behavior of a structure subjected to axial impact. In this paper, a simple practical method is introduced to enhance the crushing behavior of this kind of structure. The dynamic explicit simulation of axial impact of metallic energy absor…
Shampoo is a hair care product used for the removal of oils, dirt, skin particles, dandruff, environmental pollutants and other contaminant particles that gradually build up in hair. Shampoos are products which remove surface grease and dirt from the hair shaft and scalp. The cleansing or detergent action of a shampoo…
The scientific literature rarely reports experimental failures or inconsistent outcomes in the induction of cell differentiation; however, researchers commonly experience poor or unsuccessful responses to differentiating agents when culturing stem cells. One way of investigating the underlying reasons for such respons…
In this paper, the photonic band gap (PBG) properties of two dimensional (2D) square lattice photonic crystal structures composed of rectangular cells were studied. The effect of refractive index, rectangles length and the ratio of width to length of the rectangles on the PBG properties of the structure with different…
Zirconia-nickel functionally graded materials were obtained by powder metallurgy technique. The microstructure, residual stress, fracture toughness and Vickers hardness were investigated. Mixed-mode fracture response of YSZ /Ni functionally graded materials was examined utilizing the three point bending test and finite…
Biological materials are increasingly used in the repair of tissue defects. To reduce antigenicity, biological tissues have to be acellularized and or fixed with a crosslinking agent before implantation. In this study, an acellularization process was employed to remove the cellular components from swim bladder of fish…